20050121 has 16 divisors (see below), whose sum is σ = 24998400. Its totient is φ = 15657408.

The previous prime is 20050117. The next prime is 20050127. The reversal of 20050121 is 12105002.

It is not a de Polignac number, because 20050121 - 2² = 20050117 is a prime.

It is a super-2 number, since 2×20050121² = 804014704229282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20050127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5795 + ... + 8583.

It is an arithmetic number, because the mean of its divisors is an integer number (1562400).

Almost surely, 2^20050121 is an apocalyptic number.

It is an amenable number.

20050121 is a deficient number, since it is larger than the sum of its proper divisors (4948279).

20050121 is a wasteful number, since it uses less digits than its factorization.

20050121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 20050121 is about 4477.7361467599. The cubic root of 20050121 is about 271.6683213837.

Adding to 20050121 its reverse (12105002), we get a palindrome (32155123).

The spelling of 20050121 in words is "twenty million, fifty thousand, one hundred twenty-one".